/*
 * @(#)ShellWhich.java	1.0 Apr 18, 2008
 *
 *	The MIT License
 *
 *	Copyright (c) 2008 Malachi de AElfweald <malachid@gmail.com>
 *
 *	Permission is hereby granted, free of charge, to any person obtaining a copy
 *	of this software and associated documentation files (the "Software"), to deal
 *	in the Software without restriction, including without limitation the rights
 *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the Software is
 *	furnished to do so, subject to the following conditions:
 *
 *	The above copyright notice and this permission notice shall be included in
 *	all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *	THE SOFTWARE.
 */
package org.eoti.io.console.shell.cmd;

import org.eoti.io.console.shell.ShellException;
import org.eoti.io.console.shell.ShellExtension;

import java.net.URISyntaxException;
import java.net.URL;
import java.util.List;

public class ShellWhich extends ShellExtension
{
	public ShellWhich(){super();}

	public void execute(List<String> arguments)
			throws ShellException
	{
		if(arguments.size() != 1)
			error("Incorrect number of arguments. Expected 'find resource'.");

		String toFind = arguments.remove(0).trim();
		if(find(toFind)) return;
		if(findExtension(toFind)) return;
		error("Could not locate a resource or extension name: '%s'.", toFind);
	}

	protected boolean findExtension(String name)
			throws ShellException
	{
		ShellExtension ext = shell.getExtension(name);
		if(ext == null) return false;
		name = ext.getClass().toString().replaceAll("\\.", "/");
		name = name.replace("class ", "/");
		name = name + ".class";
		
		return find(name);
	}
	protected boolean find(String name)
			throws ShellException
	{
		URL url = this.getClass().getResource(name);
//		shell.format("%s = %s\n", name, url);
		if(url == null) return false;
		display(url);
		return true;
	}

	protected void display(URL url)
			throws ShellException
	{
		try{
			shell.format("%s\n", url.toURI());
		} catch(URISyntaxException e){
			error(e, "Problem with %s", url);
		}
	}

	public String getName()
	{
		return "which";
	}

	public String getUsage()
	{
		return "Example: 'which /org/eoti/io/console/shell/cmd/ShellWhich.class'";
	}
}
